Speed-recording apparatus for vehicles.



J. SCHLENKER. sPRRD RRGORDING APPARATUS RoR VEHICLES. APPLICATION FILEDJUNB8,1911.

Patented June 18, 1912.

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UNITED STATES PATENT GEFICE.

JAKOB SCHLENKER, OF SCHWENNINGEN, GER-MANY.

SPEED-RECORDING APPARATUS FOR VEHICLES.

To all whom it may concern:

Be it known that I, Jiiiior. Soi-Hickman, a citizen of the GermanEmpire, residing at Schwenningen, in the Kingdom of llVurtteniberg, insaid Empire, have invented certain new and useful Improvements in Speed-Recording Apparatuses for Vehicles, of which the following is aspecification.

This invention relates to speed-recording apparatuses for vehicles, andmore especially to the marking devices for the same. In similarapparatuses heretofore employed, the main objection to the same was thatthe proper and reliable marking was impaired by exterior influences, forthe reason that the marking devices were functioning satisfactorilyeither on good smooth roads, or only on bad roads, or that they werefunctioning reliably only at slow speed on good roads, while they arefunctioned poorly and unreliably at high speed, and failed to mark thespeed entirely on rough roads at high speed.

The obj ect of this invention is to overcome the defects referred to andto so improve the marking devices of the speed-recording apparatuses forvehicles that they produce the uniform and reliable working of themarking devices without regard to the good or bad condition of the roadand the slow or high speed of the vehicle; and for this purpose theinvent-ion consists of an improved marking mechanism for speed-recordingapparatus for vehicles in which a recorddisk driven by a clock movement,is moved between a pointed marker on a marking lever and thecorrespondingly indented poi'- tion of a pressure-spring on said leverso that the marker impresses or engraves the. speed of the vehicle onthe record-disk while the marking lever is oscillated by a suitabletransmitting mechanism from the axle of the vehicle and positivelyguided by a guiding device and a cushioning spring, so as to produce theproper marking of the changing speed of the vehicle on the record-diskand furnish an accurate record of the speed of the vehicle from hour tohour as the disk is moved through the marking devices.

In the accompanying drawings, Figure 1 represents a side-elevation of myimproved marking device for a speed-recording apparatus for vehicles,Fig. 2 a front-view of Fig. l, Fig. 3 a vertical transverse section online 8, 3, Fig. 2, and Fig. et a detail vertical Specification ofLetters Patent.

Application led June 8, 1911.

Patented June 18, 1912.

Serial No. 631,948.

section on line 4, 4, Fig. 2, taker. in the direction of the arrow insaid ligure.

Similar letters of reference indicate the same parts in thedifferentfigures of the drawings.

Referring to the drawings, 1 represents an upright post, which isattached to the base-plate 11 of the speed-recording apparatus. To thepost l is applied an oscillating marking lever 2 by means of a sleeve orhub 21. Near the inner end of the marking lever 2 is arranged anupwardly-projecting and pointed marker 3 which takes into acorresponding indentation 4. at the underside of a flat pressure-spring5, the outer end of which is attached by screws 5 to the marking lever2. The positions of the pointed marker and indentation may also bereversed, that is to say, the marker may be applied to the spring andthe indentation to the lever 2. A recorddisk 6 is applied to therotatory dial of a clock-movement not shown) and supported excliangeablythereon in a manner similar to the record-disks in watchmenstimecontrolling clock The record-disk G may be made of soft paper,preferably tracing paper, which is inserted between the fiat spring 5and the marker 3, as shown clearly in the detail Fig. 3. The inner endof the flat spring 5 is bent up for permitting the convenient lifting upof the spring for inserting the circumferential portion of therecord-disk G. A stop-screw 52 limits the upward movement of the spring5. The record-disk 6 turns with the dial of the clockmovement oncewithin 2li or 48 hours and is by the latter moved slowly between themarking devices 3 and 4 and pressed by the marker into the indentationof the pressure spring and so that the movement of the marker isscratched or engraved into the record-disk.

The oscillating marking lever 2 is provided with an oblong slot 7 whichis engaged by the crank-pin S of a crank-shaft 9. The crank-pin 9 isturned on its aXis at' a speed corresponding to the speed of the vehicleto t-he axle of which the recording apparatus is applied. It movesthereby the marking lever 2 quicker or slower toward or away from the4center of the clock-movement. The crank-shaft 9 is supported in aneck-bearing of a bridge l0, attached to the side-plate of theapparatus, and a step-bearing of the base-plate 11, and rotated by amotion-transmitting mechanism which is interposed between the axle a ofthe vehicle and the crank-shaft 9. rIhis motion-transmitting mechanismconsists of a pawl 16 which is pivoted to a plate 2() that is actuatedby a cam al on the axle o, and intermediate mechanism (E, a3, at, saidpawl being provided with a short extension 22 which abuts against astop-pin 28 on the plate 20. A helical spring 2a is interposed betweenthe base-plate 11 and a bracket 25 on the plate 2O whereby the pawl 1Gis held in engagement with the teeth of a ratchet wheel 13 which ismounted on a horizontal shaft 14. rIhe shaft 14; is supported sidewise`of and at right angles to the crank-shaft 9. A check-pawl 2G preventsthe turning of the ratchet-wheel in opposite direction to that impartedby the pawl 2G. To the shaft 111- is keyed a worm 15 which meshes with aworm-wheel 12 on the crank-shaft 9. At each rotation ot the axle a ofthe vehicle, the pawl 16 engages a tooth of the ratchetwheel 18 andmoves thereby the crankpin S and the marking lever for a short distanceso that the marker is moved over the record-disk 6, while the latter isrotated by the clock-movement. W hen the axle of the vehicle is rotatedat high speed, the record-disk is marked by radial zig-zag lines locatedclosely to each other, while at slower speed the zig-Zag lines are atincreased distances from each other, and at still slower speedconnecting lines between the zig-Zag lines are formed, as shown in F ig.2. When the motion of the vehicle is arrested a line concentric with theaxis of the clock-movement is formed as the recorddisk continues itsrotatory movement while the marking devices are at rest and embed orscratch a peripheral line on the recorddisk.

The marking lever 2 is pressed by a helical spring 17 toward theclock-movement which spring prevents in connection with the crank-pinthe vibration of the marking devices at the point ot marking andprevents thereby the tearing of the record-disk and the inaccuratemarking of the same. To prevent the lateral movement of the markinglever 2, the inner end of the 'same is guided in a grooved bracket 19 ona guidepost 18, so that the marking lever can freely oscillate laterallyin the grooved bracket 19 for keeping the marking devices in positiveand regular contact with the record-disk and produce t-he accurate andreliable marking of the same.

The speed-controlling apparatus is mainly intended for use with thedriving axles of automobiles, but can also be applied to the axle of anyother vehicle driven at variable speed.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. In a speed-recording apparatus for vehicles, the combination of asupport for a record-disk, marking devices between which the record-diskis moved, and comprising an oscillating marking lever and apressurespring on the same, a motion transmitting mechanism interposedbetween the axle of the vehicle and the marking devices for oscillatingthe latter, and a guide-device for the inner end of the marking lever.

In a speed-recording apparatus for vehicles, the combination of asupport for a record-disk, marking devices between which the record-diskis moved, and comprising an oscillating marking lever and apressurespring on the same, a motion-transmitting mechanism interposedbetween the axle ot' the vehicle and the marking devices Ltoroscillating the latter, a guide-device for the inner end of the markinglever, and a spring for pressing the marking lever toward the center ofthe record-disk.

3. In a speed-recording apparatus for vehicles, the combination of asupport for a record-disk, oscillating marking devices consisting of amarking lever provided with a pointed marker and a pressure-spring onthe same provided with a corresponding indentation above the marker, amotion-transmitting mechanism between the axle of the vehicle and themarking lever, and a guidedevice for the inner end of the marking lever.

4t. In a speed-recording apparatus for vehicles, the combination of asupport for a record-disk, marking devices between which the record-diskis moved and consisting of a marking lever having a pointed marker, anda pressure-spring having an indentation above the marker, a crank-shaft,the crankpin of which engages the marking lever, and amotion-transmitting mechanism between the axle of the vehicle and thecrank-shaft, a spring pressing the marking lever toward the center ofthe record-disk, and a grooved post'for guiding the inner end of themarking lever.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

JAKOB S CHLENKER.

Viitnesses ERNEST ENTENMANN, PAULINE It/ILLER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

, Washington, D. C.

